Problem with corals

[reefwars]

Originally Posted by 1bigstud

I've ran carbon for about 4 weeks. I didnt think the salinity would have been an issue, there isnt really any nuisance algae in my tank.
really dont know what the problem could be.

thats probably it too just a sudden shift to clean water from the carbon if i were you i would replace one of the dead corals and see if it dies off again